Merge pull request #723 from rjc123/businesslink

Decommission businesslink assets from redirector, replace with mappings
Change date for HPA
Change date of Phase 1 sites to 1st July
Configure legacy domain with global (nuclear) option to organisational homepage
Add comment regarding legacy domain configuration
Merge pull request #724 from rjc123/newmappings

Change date for HPA
Change date of smokecontrol.defra.gov.uk transition
Configure prtr.defra.gov.uk on transition
Merge pull request #725 from rjc123/newmappings

Configure Defra orgs / sites on transition
Config query strings for prtr
Merge pull request #726 from rjc123/newmappings

Config query strings for prtr
Configure upcoming blogs as global with path preserved
Delete tests for aka.bis.gov.uk

bis has been managed by transition for some time, and now that it
has fully transitioned we shouldn't need to test the aka domain anyway.
Delete popular tests for decc_og

This site has been managed by transition for some time.
Merge pull request #727 from rjc123/newmappings

Configure upcoming blogs as global with path preserved
Merge pull request #728 from alphagov/delete_aka_bis_tests

Delete tests for aka.bis.gov.uk
Merge pull request #729 from alphagov/delete_decc_og_popular_tests

Delete popular tests for decc_og
Replace piplink rule with individual mappings
Remove businesslink homepage and search rules and replace with mappings